Maybe take the reprap idea and use solder paste to fill the track, either from syringe that squeezes it out under printer control also, or hand squeegied out like when applying paste with a mylar/steel stencil.
Maybe take the reprap idea and use solder paste to fill the track, either from syringe that squeezes it out under printer control also, or hand squeegied out like when applying paste with a mylar/steel stencil.